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F. AMOS.

INSULATORI APPLICATION FILED NOV. 28. I9I1.

Patented July 29, 1919.

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INSULATOR Patented July 29,1919.

Application filed November 28, 1917. Serial No. 204,424.

1 311 483. Specification of Letters Patent. I

To all whom it may concern:

Be it known that I, FRANK AMos, a citizen of the United States, residing at Wheeling, in the county of Ohio and State of West Virginia, have invented a certain new and useful Improvement in Insulators, of which the following is a specification.

This invention pertains to insulators and relates more particularly to that type wherein a base and cap piece are employed to hold and clamp one or more wires between them when the parts or elements are in juxtaposition and secured together andin place by a screwornail.

The main object of the invention is to produce an insulator easy of manufacture and which at the same'time will effectively hold the wires in place. 7 I

A further object of the invention resides in so constructing the members of the insulator that the Wire will be firmly clamped and any strain or pull exerted on the wire the retaining-elements of the members more tightly grip or bind the wire in place. I 4 p i A still further object is to provide a head or cap piece which is symmetrical in form and may, therefore, be placed in clamping relation to the base and wire or wireswithout the necessity of bringing such head into a particular relationship With the underlying wire-receiving grooves in the base.

With these and'other'objects in view, a description of the insulator will be given, reference being had to the annexed drawings, wherein: f 1

Figure 1 is a perspective v1ew of the base and head, the under face of the latter being exposed and partly broken away Fig. 2 a vertical sectional view of, the

. base and head, the plane of section of the base being indicated by the line II-II of Fi 1- Figfit a similar view of the base, the plane of section being .on the line III-III of Fig. 1; and

Fig. 4 a sectional elevation of the base and cap. 7

The parts will'preferably be formed of porcelain or other suitable dielectric material, which may be readily molded and will afford requisite strength. v

The base, denoted by 1,,w1ll preferably be cylindrical in form and provided on ts upper end or face 2 with a centrally-dis following arrangement is employed:

poseds tud or teat 3 and two parallel grooves or channels 4, I, the outer ends of which are. g vena s11 ht downward inclination, as best,

shown in *ig. 3. A series of transverse or cross ribs 5 is provided in the bottom of each groove, the ribs being narrow or presentin a comparatively sharp upper edge, as will be best seen upon reference to Fig. 3.

'The cap or head piece, denoted by 6, is circular in outline, and is provided with a central socket or recess 7, a circumferentially-disposed depending narrow rim 8, and

a series of radially-disposed ribs 9, extending inwardly from the rim to the recess or socket 7, of a size to receive the stud 3.

The head and base are provided with alining bores 10 and 11, as is usual, and through whichthe fastening element, as a nail or screw, may be passed.

The lower end of the base will preferably be hollowed out'to save material, and lighten the device, and to likewise produce an annular rim 12, which assists the structure in more readily finding a bearing on the surface to which it is secured than would be the case if the under surface were flat and unbroken. J The diameter of the cap and body is preferably the same, and the lug or teat 3 is rounded except where it is cut away or reduced by the formation of the cross-grooves 4; consequently, the lug entering the recess 7 centers the head or cap, and the flange or rim 8 bears upon or overlies the upper face 2 of the body 1. This permits of the placement of the cap on the body without the necessity of bringing the parts to any definite position or .1 adjustment. j

By reason of the radial arrangement of the ribs 9 and the transverse disposition of the ribs 5, the two series of ribs will, in wholeor in part, stand at an angle to each other, it being, of course, possible under one position to have one of the ribs 9 to each side of the socket 7 parallel to the rib 6 in the underlying grooves 4c. Theremaining ribs 9 will, however, have an angular relation to the ribs 5.

In order to permit of the placement of the cap upon the base so that both may be fired at the same time, and utilize the same space in the sagger during such firing, the

s willbebest noted upon reference to Figs. 1 and 4, the upper face of the base is prowill contact with the ribs videdwith two small stick-ups or pro- 7 jections .13, which are located adjacent, the grooves' The'upper face, intermediate the.

grooves andiadja'cent each end thereof, is'

cut away or depressed slightly, as at l4, so that said cut-away-portions are of sub; stantially areseparatedafter firing the rim remains V intact andthe only 'points"which"have to be broken awayare those which obtain between the upper end of the stick-ups and the contacting ribs. 3 '1 The construction above outlined admitsof the ready placement of the wires, and insures their retention in plac'e. The depend ing flange or rim 8, the radially-disposed ribs 9, andthe transverse ribs 5 bite into the wires. or the insulation thereof and firmly hold the wires against movement. The angular disposition of the ribs effectively grips the wire and'any pull or strain exerted on the wire tends to crowd the same laterally and cause itto more firmly hug the wall ofithe groove 4 through-which it ex tends. p a

It is likewise to 'be' noted'that'the' dependingflange8 and the ribs 9 both ove'rli'eand contact with the wire which is placed in-the grooves 4. 'The depending fiange8 contacts with the wire adjacent each 'end of the groove and such portion of the flange stands at an angle to theEribs 5and also; the ribs 9, and furthermore, such contacting por tions of the flange8'stand at an angle to each other. Thus the] upper face-of- -the Wire is in contact with the angularly-disposed ribs'S), and the depending portions of the flange 8 which, as just noted, stand at an angle 'to each other and to said ribs 9. Furthermore, the ribs-5 stand'at an angle to the overlying ribs 9 andthe depending flange 8. I There is thus produced a number of, linesof contact extending across the wire, particularly theupper portion thereof, which? are angular-1y disposedto each other andall of which have'a tendencyto hold the'wire firmly in place without any undue strain thereon.'-

It will, of course, be appr'e'ciated,' that a greater'number of ribs 9 than those shown may bev employed, that being a mere matter ofudegree "and 'f-alling 7 within the scope of V my.-invention. r

the same height .as the other parts of the' fac'e 2. When the tip is placed upon formed, and as the 7 Having thus described my invention, what I claim is: s h v v is V 1. An insulator, comprising in combination a body, and a cap-piece provided with alining bores, the body at its upper end being formed with a wire-receivinggroove having a series of transverse ribs extending upwardly from the bottom thereof'an'd likewise provided with a: lug or teat extending outwardly from the upper face of the body, and said cap piece being provided with a centrally-disposed socket to receive the lugor teat and likewise with aseries of radially v di-sposed'ribs formedupon the under face of the cap, the ribs extending outwardly to a pointadjacent the peripherybfthe' cap and overlying the groove, said'ribs being of a depth such that they project downwardly to substantially the underplane of the cap and contact with the wire which is placed within the groove and force the'wire into contact with the ribs without bending the wire. v

2. An insulator, comprising incombination abody, the upper end of said body beingformed with an upwardly projecting lug and havin a pairof grooves formed in said upper en on opposite sides of the lug, said grooves having cross ribs formed therein; and a cap-piece,

I in the groove said cap-piece upon its.

under face being formed with a central socketto receive the lug aforesaid and likewise having ,a' series of radially-disposed ribs upon'its under face'which terminate at their outer ends in a downwardly-extending circumferential flange, the 1 ribs and flange being of a substantially equal depth 7 and adapted to impinge against the wires laid within the grooves without bending the same, the body and cap piece being pro vided with 'alining bores; H a s 3. Aninsulator, comprisingin combination cylindrical body portion having two grooves extending across the upper face thereof; a series of ribs extending transs versely across the bottom of each groove, and a-teat projecting upwardly from' the face intermediatethe groovesyand a cap piece having a narrow depend ng circumferential rim formed thereon, and a series of radia-lly disposed ribs :eXtendin I inwardly from the flange, said ribsand tinge. being of substantially equal depth and said ribs terminatingat their innerends in linewith the wall of a socket formedjcentrallyin the lower face of the capand adapted toreceive the teat -aforesaid and to thereby center the cap upon the body portion, said cap and body portionwbeing likewise :provided with alining'bores. 1, a J :4; An insulator, comprising in combina.- tion a body; anda cap-piece provided with al'ining "bores, the bod yiat rits. upper end being formed with wire-receiving grooves havinga series oftransverse rlbsextending 19 0 upwardly from the bottom thereof and likewise provided with a lug or teat extending upwardly from the upper face of the body and also with a plurality of stickups extending upwardly from the upper face of the body, and said cappiece being provided with a centrally-dis osed socket to receive the lug or teat and li ewise with a series of radiallydisposed ribs formed upon the under face of the cap, the ribs extendin downwardly to a point adjacent the perlphery of the cap and overlying the grooves, said ribs being of such depth as to contact with the wires when placed within the grooves.

5. An insulator, comprising in combina- Copies of this patent may FRANK AMOS.

Commissioner of Patents,

Washington, I). 0.

beyond the plane of the upper face 

